トビヌメリの産卵時刻におよぼす光周期の影響

DOI 日本農学文献記事索引 Web Site 被引用文献3件

書誌事項

タイトル別名
  • Effects of Photoperiod on Spawning Rhythm in the Tobinumeri-Dragonet Repomucenus beniteguri.
  • トビヌメリの産卵時刻におよぼす光周期の影響〔英文〕
  • トビヌメリ ノ サンラン ジコク ニ オヨボス ヒカリ シュウキ ノ エイキョ
公開日
1991
資源種別
journal article
DOI
  • 10.2331/suisan.57.2033
公開者
公益社団法人 日本水産学会

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説明

In order to record the daily spawning time of individual fish, one female and two male tobinu-meri-dragonet were reared in separate indoor tanks (1×2×0.8 m) from September 30. The photo-period in each tank was regulated by a timer and water temperature was maintained at 22-24°C during the experiment and the spawning time was determined by checking the existence of spawned eggs on the net placed at the overflow outlet of each tank every 15 minutes.<br> In experiment 1, two females continued daily spawning. Spawning occurred during 1700-1900 hr when the fish were kept under a photophase of 0500-1900h (14L10D). When the photo-phase was shifted from 0500-1900h to 0100-1500h (14L10D), the spawning time was advanced by an average of 3.2 hours. Thereafter, we delayed the time of lights-on by 4 hours (10L14D); how-ever, spawning time was delayed only 0.7 hours. By delaying the time of lights-off by 4 hours (14L10D), spawning time was delayed 2.6 hours. In experiment 2, four females continued daily spawning. When the time of lights-off was advanced 4 hours (10L14D), spawning time advanced 3.1 hours. These results indicate that the spawning time is determined photoperiodically. The time of lights-off seems more significant than that of lights-on in the regulation of spawning time, indicating that “lights-off” is working as a synchronizer.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 57 (11), 2033-2037, 1991

    公益社団法人 日本水産学会

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